An OSI layer model for the 21st century

…in the integers mod 2 (a.k.a. the finite field of order 2). Multiplication mod 2 is AND: A B (AB) A B AND 0 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1 Adding one mod 2 is NOT: A (A+1) A NOT 0 1 1 1 0 0 So, multiplication plus one is NAND: A B (AB+1) A B NAND 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0 0 Since NAND is universal, and any finite composition of polynomials...

Thanks to fellow Hacker Schooler Leah Steinberg for inspiring this post! Having intermittently struggled with apache2 configuration files for the majority of my adult life, I find nginx an absolute joy to set up. I’m completely sincere about that. But, for those who are just getting into Web development, nginx is just about as much of a struggle...

The Virtual Network Computing (VNC) system for accessing the GUI environments of remote computers uses a protocol called Remote Frame Buffer (RFB) to exchange data about graphics output as well as keyboard and mouse input. RFB turns out to be a very sane protocol (specification PDF here) compared with X11, and infinitely more sane than Cocoa...

Now that nearly every computer has some form of multi-processing (that is, multiple CPUs sharing a single address space), some high-level languages are starting to get attention for their concurrency features. Many languages refer to such features as “concurrency primitives.” But since these are high-level languages, we know that these...

General disclaimer for InfoSec articles: Reading this article does not qualify you to design secure systems. Writing this article does not qualify me to design secure systems. In fact, nobody is qualified to design secure systems. A system should not be considered secure unless it has been reviewed by multiple security experts and resisted...